Gree FGR25Pd/DNa-X Service Manual page 45

 Protocal selection: This is to select the communication method of your units. Currently, CAN is
applicable to the units.
 After the selection, click "Connnect". If units can communicate normally with computer, then the
interface of numbers will be shown soon. Otherwise, "Connecting" will be shown.
Duct type split Air conditioner Inverter Series
43